<!DOCTYPE html>
<html>

<head lang="en">
  <meta charset="UTF-8">
  <title></title>
  <style type="text/css">
    div,
    span,
    h1 {
      color: blue;
    }
  </style>
</head>

<body>
  <div>并行选择器div</div>
  <span>并行选择器span</span>
  <h1>并行选择器h1</h1>

</body>

</html>
